Summary
NGC 1084 is an unbarred spiral galaxy in the constellation Eridanus. It is located at a distance of about 63 million light-years away from the Milky Way. The galaxy was discovered by William Herschel on 10 January 1785. It has multiple spiral arms, which are not well defined.[6] It belongs in the same galaxy group with NGC 988, NGC 991, NGC 1022, NGC 1035, NGC 1042, NGC 1047, NGC 1052 and NGC 1110. This group is in turn associated with the Messier 77 group.[7]
| NGC 1084 | |
|---|---|
 NGC 1084 by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 02h 45m 59.926s[1] |
| Declination | −07° 34′ 43.10″[1] |
| Redshift | 1,406 km/s[2] |
| Distance | 62.7 Mly (19.23 Mpc)[2] |
| Apparent magnitude (V) | 10.7 |
| Characteristics | |
| Type | SAc[3][4] |
| Apparent size (V) | 3.2′ × 1.8′[3] |
| Other designations | |
| LEDA 10464, MCG-01-08-007[5] PGC 10464[3] | |
Star formation in the galaxy is chaotic and not confined to the spiral arms, but the rate is not high enough to classify it as a starburst galaxy. Star formation has taken place in small bursts in the last 40 million years. The cause of this activity has been proposed as a merger with a gas-rich dwarf galaxy. A radio source has been detected 3.5' south-west of the galaxy, connected to it by a bridge.[8] NGC 1084 has been the site of 5 supernovae explosions since 1963: SN 1963P (mag. 14), SN 1996an (Type II, mag. 14), SN 1998dl (Type II, mag. 16), SN 2009H (Type II, mag. 17), and SN 2012ec (Type IIP, mag. 14,5).[9][10]
Gallery edit
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NGC 1084 by 2MASS -
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NGC 1084 by the Hubble Space Telescope -
Hubble Space Telescope image of NGC 1084. -
The galaxy as imaged by the Legacy surveys, showing the tidal structures of NGC 1084
References edit
- ^ a b Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
- ^ a b Tully, R. Brent; et al. (2016). "Cosmicflows-3". The Astronomical Journal. 152 (2): 21. arXiv:1605.01765. Bibcode:2016AJ....152...50T. doi:10.3847/0004-6256/152/2/50. S2CID 250737862. 50.
- ^ a b c "NASA/IPAC Extragalactic Database". Results for NGC 1084. Retrieved 2016-01-02.
- ^ Ann, H. B.; et al. (2015). "A Catalog of Visually Classified Galaxies in the Local (z ~ 0.01) Universe". The Astrophysical Journal Supplement Series. 217 (2): 27–49. arXiv:1502.03545. Bibcode:2015ApJS..217...27A. doi:10.1088/0067-0049/217/2/27. S2CID 119253507.
- ^ "NGC 1084". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-04-07.
- ^ Eskridge, Paul B.; et al. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series. 143 (1): 73–111. arXiv:astro-ph/0206320. Bibcode:2002ApJS..143...73E. doi:10.1086/342340. S2CID 15491635.
- ^ Makarov, Dmitry; Karachentsev, Igor (2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society. 412 (4): 2498–2520. arXiv:1011.6277. Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID 119194025.
- ^ Ramya, S.; et al. (October 2007). "Study of star formation in NGC 1084". Monthly Notices of the Royal Astronomical Society. 381 (2): 511–524. arXiv:0707.2366. Bibcode:2007MNRAS.381..511R. doi:10.1111/j.1365-2966.2007.12232.x. S2CID 16910522.
- ^ "List of Supernovae". IAU Central Bureau for Astronomical Telegrams. Retrieved 29 December 2015.
- ^ "A spiral home to exploding stars". Hubble Space Telescope. 31 March 2014.
External links edit
Media related to NGC 1084 at Wikimedia Commons- NGC 1084 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
